Texas Instruments TL1963AKTTRG3

Overview

TL1963AKTTRG3 from Texas Instruments is a 1.5A low-noise, fast-transient-response LDO regulator in a 5-pin DDPAK/TO-263 (KTT) package, supporting adjustable output (1.21V–20V) or fixed 3.3V operation. It delivers ±1.5% output accuracy over line/load/temperature, 340mV typical dropout at 1.5A, and 23μVRMS output noise (10Hz–100kHz), making it suitable for RF power supply rails in semiconductor test equipment.

For engineers reviewing the TL1963AKTTRG3 datasheet, TL1963AKTTRG3 pinout, TL1963AKTTRG3 application, or TL1963AKTTRG3 equivalent, this page provides verified electrical specifications, thermal performance data, shutdown control behavior, reverse-current protection timing, and KTT-package layout guidance for high-current industrial power designs.

Technical Context

The TL1963AKTTRG3 implements a PMOS pass transistor architecture enabling ultra-low dropout and inherent reverse-current blocking without external diodes. Its error amplifier features Kelvin-sense capability via dedicated SENSE/ADJ pin, allowing remote voltage sensing to compensate for PCB trace IR drop in high-precision applications.

It integrates active thermal shutdown (trip at 150°C, hysteresis ~20°C), current limiting (1.6A min over temperature), and reverse-current protection with 5µs response time when V_OUT – V_IN exceeds 25mV - critical for systems with multiple power domains or hot-swap requirements.

Key Specifications

Pinout & Package

TL1963AKTTRG3 uses a 5-pin DDPAK/TO-263 (KTT) package measuring 10.16mm × 15.24mm with exposed thermal pad soldered to PCB ground for optimal thermal performance (R_θJA = 32.9°C/W).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar LDO regulator applications.

Compared with TLS850F0TES and TPS7A8300RGRT, TL1963AKTTRG3 uniquely balances 1.5A output, 23μVRMS noise, and integrated reverse-current protection in a thermally robust KTT package - ideal for industrial ATE and energy infrastructure where reliability under load transients is critical.

Availability

TL1963AKTTRG3 is available at Aetrix Electronics and suitable for EV charging infrastructure, energy storage systems, and semiconductor test equipment requiring stable component supply with full traceability and long-term lifecycle support.

Supply support for TL1963AKTTRG3 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor leader delivering analog and embedded processing solutions for industrial, automotive, and communications markets.

The TL1963A product line targets high-current, low-noise LDO applications in test equipment, medical imaging, and industrial power systems where fast transient response and reverse-current blocking are essential design requirements.

FAQ

What is the maximum output current specification for TL1963AKTTRG3?

TL1963AKTTRG3 delivers up to 1.5A of continuous output current at junction temperatures from –40°C to +125°C. Current limit is guaranteed at 1.6A minimum over temperature, with thermal shutdown activating at 150°C to protect the device during sustained overload conditions. This rating applies specifically to the KTT package with proper PCB thermal design.

Does TL1963AKTTRG3 support adjustable output voltage configurations?

Yes, TL1963AKTTRG3 supports both fixed-output (e.g., 3.3V) and adjustable-output modes. In adjustable mode, the SENSE/ADJ pin connects to a resistor divider between OUT and GND to set output from 1.21V to 20V. The ADJ pin bias current is ≤10μA, ensuring minimal impact on divider accuracy - a key design consideration for precision applications using TL1963AKTTRG3.

What thermal performance can be expected from TL1963AKTTRG3 in its KTT package?

TL1963AKTTRG3 in the KTT package achieves a junction-to-ambient thermal resistance (R_θJA) of 32.9°C/W with standard 2-layer PCB layout and full thermal pad soldering. Its junction-to-board (R_θJB) is 18.9°C/W, confirming strong heat conduction into the PCB. These values enable 1.5A operation at ambient temperatures up to +85°C without forced airflow when using recommended copper area per TI's layout guidelines for TL1963AKTTRG3.

How does the reverse-current protection function in TL1963AKTTRG3?

TL1963AKTTRG3 detects reverse current when V_OUT exceeds V_IN by more than 25mV and blocks flow within 5µs. This feature prevents backfeeding in multi-supply systems - for example, when a backup rail remains active while main input is removed. Unlike legacy TL1963A versions, TL1963AKTTRG3 does not include reverse-battery protection, so external diode protection is required in automotive battery-reversal scenarios.

What output capacitor requirements apply to TL1963AKTTRG3 for stable operation?

TL1963AKTTRG3 requires a minimum 10μF ceramic output capacitor with ESR ≤3Ω for stability across all operating conditions. TI recommends X7R or X5R dielectrics placed as close as possible to the OUT and GND pins. Larger capacitance improves transient response - especially critical in semiconductor ATE applications where TL1963AKTTRG3 powers rapidly switching DUTs - but does not degrade stability.